Although biodiesel is cleaner burning than petroleum diesel, pure biodiesel (B100) requires fuel system modifications on pre-1994 diesel engines.

Question

Quizplus · Accepted Answer

Pure biodiesel (B100) has different chemical properties than petroleum diesel, including higher viscosity and different solvent properties, which can affect rubber seals and gaskets in older engines, often requiring modifications to the fuel system for compatibility.

Although Biodiesel Is Cleaner Burning Than Petroleum Diesel, Pure Biodiesel